October 2011
Intermediate to advanced
300 pages
5h 51m
English
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Running Puppet from cron
Is your Puppet sleeping on the job? By default, when you run the Puppet agent on a client, it will become a daemon (background process), waking up every 30 minutes to check for any manifest updates and apply them (optionally after a randomized delay using the splay setting in puppet.conf). If you want more control over when Puppet runs, you can trigger it using cron instead.
For example, if you have many Puppet clients, you may want to deliberately stagger the Puppet run times to spread the load on the Puppetmaster. A simple way to do this is to set the minute or hour of the cron job time using a hash of the client hostname.
How to do it...
Use Puppet's inline_template function, which allows you to execute Ruby code:
cron ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.